Rainbow Astro RST-135 mount: Lightweight, High-Performance and Ultimate Precision for Astrophotography
The Rainbow Astro RST-135 mount revolutionizes nomadic astrophotography thanks to its innovative technology, combining exceptional lightness, uncompromising precision and versatility of use. Available in two versions, the standard RST-135 and the RST-135E with absolute encoders, it meets the varied needs of both amateur astronomers and professional astrophotographers.
Why choose the Rainbow Astro RST-135?
Harmonic Drive technology (Strain Wave Gear) Drastically reduces backlash, guaranteeing precise tracking even without counterweights.
Featherweight Only 3.3 kg for a load capacity of up to 13.5 kg without counterweight (18 kg with).
Dual Equatorial and Alt-Azimuthal Mode Flexibility of use for visual observation, planetary and deep-sky imaging.
Modern connectivity integrated GPS, Wi-Fi and ASCOM compatibility for quick and easy control via smartphone or PC.
Premium Design Sturdy construction in CNC-machined AL6061 aluminum, durable and aesthetically pleasing.
RST-135 vs RST-135E : Comparison chart
Features
RST-135
RST-135E (Absolute encoders)
Weight
3.3 kg
3.4 kg
Payload
13.5 kg (without counterweight)
13.5 kg (without counterweight)
Transmission
Harmonic Drive
Harmonic Drive
Absolute encoders
No
Yes (RA axis, Renishaw)
Engine
Swiss made Maxon DC High precision servo
Swiss made Maxon DC High precision servo
Periodic accuracy (PE)
Better than competitors
± 2.5 arcsec, real-time correction via encoder
Recovery from power failure
Manual search required
Immediate automatic restart (absolute encoder)
Key benefits and differentiation
Harmonic Drive technology virtually eliminates mechanical backlash, resulting in exceptional precision when tracking celestial objects. Unlike traditional geared mounts, it requires no adjustment of mechanical backlash, reducing maintenance to a minimum.
Thanks to its light weight and high load-bearing capacity without counterweight, the RST-135 is ideal for travelling astrophotographers looking for a quick, transportable set-up.
Guiding accuracy
Rated at ± 2.5 arcsec, this mount produces perfectly round stars at any focal length!
Examples
Quick installation and commissioning
Install the mount on your tripod.
Select equatorial or alt-azimuth mode as required.
Use the built-in viewfinder to perform polar alignment.
Activate the built-in GPS to automatically initialize date, time and location.
Start the rapid alignment procedure via the controller or a compatible application.
Positioning and Guiding comparison: RST-135 vs RST-135E
Criteria
RST-135
RST-135E
Initial alignment time
~5 min
~2 min
Typical guidance error (RMS)
< 1 arcsec
< 0.5 arcsec
Resumption after interruption
Manual
Automatic
Conclusion: An exceptional mount for demanding astrophotographers
Whether you're an amateur astronomer looking for mobility and ease of use, or an experienced astrophotographer demanding impeccable precision, the Rainbow Astro RST-135 mount is the perfect solution. Choose the RST-135E if you want to benefit from the highest precision offered by absolute encoders. When you choose Rainbow Astro, you choose excellence in astrophotography.
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